The Arizona Fall League allows young Prospects to work on their stuff in the offseason, and allows pro scouts to get a better feel for their players. There are 6 teams, and each club directs a certain number of players to a designated team. For example, the Red Sox designated team is called the Surprise Saguaros, and the Sox direct 7 players onto the team. Here are the 7:

Michael Kopech: Kopech is performing well as expected, as he is 3-0 with a 2.01 ERA through 22 innings pitched. To top it off, he has 26K.

Trey Ball: Ball is 1-1 with a 6.08 ERA, through 11 games in relief.

Jalen Beeks: Beeks is 0-1 with a 6.57 ERA but shows promise as a reliever.

Jamie Callahan: Callahan has been impressive with a .75 ERA through 12 innings, and shows promise as a future reliever/closer type.

Mauricio Dubon: Dubon is batting .211 through 18 games, but shows some power at the plate, leading the team with 3 homers. As a big powerful shortstop, he fits the Correa construct in that he can hit for power yet also steal some bases.

Danny Mars: Mars is batting .259 with 15 hits. He has shown some speed on the basepaths with 3 stolen bases so far.

Yoan Moncada: Moncada is shining in the AZL Fall League. The top prospect is has 7 hits through 6 games along with 1 Home Run.

So far, all these prospects have proved their value, and hopefully they make it to the big leagues